GB9948 Cracking Seamless Steel Pipe/Tube for Heat Exchanger
Cracking seamless steel pipe is mainly in furnace/boiler, heat exchanger and petholeum pipelines as well as refinery plants.
Process: hot rolled, cold drawn and hot expanding
Steel Grade; 10,20#,15CrMo,1Cr2Mo,1Cr5Mo etc
Tolerances:
Process Type | OD | WT | ||
Cold Drawn | (mm) | Tolerance(mm) | WT (mm) | Tolerance(mm) |
>30~50 | ±0.3 | ≤30 | ±10% | |
>50~219 | ±0.8% | |||
Hot Rolled | >219 | ±1.0% | >20 | ±10% |
Standard | Steel | Tensile(MPa) | Yield(MPa) | Elongation(%) | Impact(J) | ||
GB9948 | 10 | 330~490 | ≥205 | ≥24 | / | ||
20 | 410~550 | ≥245 | ≥21 | ≥39 | / | ||
15CrMo | 440~640 | ≥235 | ≥21 | ≥47 | ≤170 | ||
1Cr2Mo | ≥390 | ≥175 | ≥22 | ≥92 | ≤179 | ||
1Cr5Mo | ≥390 | ≥195 | ≥22 | ≥92 | ≤187 |